#2 Sami Zayn
Like his compatriot Kevin Owens, Sami Zayn has been out due to injury, having suffered a shoulder injury which has put him on the shelf almost seven months. Zayn's return was also announced by the WWE recently, and he could be another Superstar who could be a surprise addition to the Royal Rumble match.
Zayn has been the goofy sidekick to Owens over the last year or so, but when they two feuded, Zayn showed his heelish side, which he should unleash when he returns to the WWE.
Fans drowned out a popular wrestler with 'She's a racist' chants recently
The Underdog from the Underground is a great technical wrestler who can put on phenomenal matches, and is pretty good on the mic too, and deserves a good run at the top. Maybe he and Owens can reunite and be at their heelish best - mocking and ridiculing the rest of the Superstars, while also working in unison to get wins.
This could start at Royal Rumble, where Zayn - or Owens - wins, and the duo fight for each other on the road to WrestleMania.